气候变化领域集成服务门户(CCPortal): Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas

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DOI	10.1111/gcb.14428
	Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas
	Sigdel, Shalik Ram; Wang, Yafeng; Julio Camarero, Jesus; Zhu, Haifeng; Liang, Eryuan; Penuelas, Josep
通讯作者	Liang, EY (通讯作者)
发表日期	2018
ISSN	1354-1013
EISSN	1365-2486
起始页码	5549
结束页码	5559
卷号	24 期号:11
英文摘要	Among forest ecosystems, the alpine treeline ecotone can be considered to be a simplified model to study global ecology and climate change. Alpine treelines are expected to shift upwards in response to global warming given that tree recruitment and growth are assumed to be mainly limited by low temperatures. However, little is known whether precipitation and temperature interact to drive long-term Himalayan treeline dynamics. Tree growth is affected by spring rainfall in the central Himalayan treelines, being good locations for testing if, in addition to temperature, precipitation mediates treeline dynamics. To test this hypothesis, we reconstructed spatiotemporal variations in treeline dynamics in 20 plots located at six alpine treeline sites, dominated by two tree species (birch, fir), and situated along an east-west precipitation gradient in the central Himalayas. Our reconstructions evidenced that treelines shifted upward in response to recent climate warming, but their shift rates were primarily mediated by spring precipitation. The rate of upward shift was higher in the wettest eastern Himalayas, suggesting that its ascent rate was facilitated by spring precipitation. The drying tendency in association with the recent warming trends observed in the central Himalayas, however, will likely hinder an upslope advancement of alpine treelines and promote downward treeline shifts if moisture availability crosses a critical minimum threshold. Our study highlights the complexity of plant responses to climate and the need to consider multiple climate factors when analyzing treeline dynamics.
关键词	CLIMATE-CHANGE ALPINE TREELINES ABIES-SPECTABILIS SPATIAL-PATTERNS TIBETAN PLATEAU ROCKY-MOUNTAINS BETULA-UTILIS FOREST DYNAMICS RECRUITMENT
英文关键词	Alpine treeline; central Himalayas; climate change; tree recruitment; treeline shift
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000447760300041
来源期刊	GLOBAL CHANGE BIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259343
推荐引用方式 GB/T 7714	Sigdel, Shalik Ram,Wang, Yafeng,Julio Camarero, Jesus,et al. Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas[J]. 中国科学院青藏高原研究所,2018,24(11).
APA	Sigdel, Shalik Ram,Wang, Yafeng,Julio Camarero, Jesus,Zhu, Haifeng,Liang, Eryuan,&Penuelas, Josep.(2018).Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas.GLOBAL CHANGE BIOLOGY,24(11).
MLA	Sigdel, Shalik Ram,et al."Moisture-mediated responsiveness of treeline shifts to global warming in the Himalayas".GLOBAL CHANGE BIOLOGY 24.11(2018).